.header {
    position: relative;
    width: 100%;
    top: 0;
    left: 0;
    height: 45px;
    line-height: 45px;
    text-align: center;
    // background-color: #fff;
    // border-bottom: solid 1px #cfcfcf;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    .title{
        font-size: 20px;
        // color: #505559;
        color: #333;
        font-family: "PingFangSC-bold";
        font-weight: 700;
        margin: 0;
        width: 200px;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
    }
    .goback-btn,button{
        position: absolute;
        left: 20px;
        width: 45px;
        line-height: 55px;
        height: 100%;
        outline: none;
        border: 0;
        background-color:transparent;
    }
}
